input{
    width: 500px;
    height: 100px;
    border: 1px solid whitesmoke;
    background-color: whitesmoke;
}
input:hover{
    width: 1000px;
    border: 1px solid black;
    background-color: white;
}
.box{
    background-color: aquamarine;
    width: 1200px;
    position: relative;
}
.anniu button{
    position: absolute;
    right: 0;
    top: 12px;
    display: flex;
    
}